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Audi says new 48 volt micro-hybrid system improves fuel economy, paves way for electrification

Most cars use a 12-volt system to power their electrical components. But, with more and more electric bits and bobs being added to new vehicles, a dozen volts is looking a bit weak these days. In fact, Audi says that standard 12-volt systems are being stretched "to their very limits." Enter 48 volts. If used in a car that gets 40 mpg, that would translate to around 43.5 mpg. Audi is testing a supplemental 48-volt electric system in two prototype vehicles – modified mild-hybrid versions of the A6 TDI and the RS 5 TDI – in order to add in more electric technology (an electric compressor, for example, to improve acceleration) and "convenience systems for dynamic chassis control." Audi says it has more applications in the pipeline, but the overall gist is that the German automaker sees 48 volts as an "important building block in electrification strategy." As you can see in the picture above (click to enlarge), the RS 5 TDI concept uses a li-ion battery installed in the back of the car and an alternator to provide 48 volts when the engine is off. Audi says that the 48-volt system can save up to 0.4 liters of fuel per 100 kilometers. To put that into US numbers, if used in a car that gets 40 miles per gallon today, that would translate into a bump up to around 43.5 mpg. The Advanced Lead Acid Battery Consortium (ALABC) is also working on a 48-volt system to improve fuel economy and we've got a deep dive of Audi's electric turbocharger here. Even more powerful and efficient – the new 48-volt technology from Audi Important building block in electrification strategy More voltage and more power for new technologies Scalable platform concept suitable for wide-ranging uses Ingolstadt, August 25, 2014 – Audi is to upgrade part of its vehicle electrical system from twelve to 48 volts. The move represents another technical building block for facilitating the integration of new automotive technologies while increasing the power and efficiency of its cars. "We are using the full bandwidth of electrification in our drive principles strategy. Running part of the vehicle electrical system at 48 volts plays a central role in this," commented Prof. Dr. Ulrich Hackenberg, Member of the Board of Management for Technical Development at Audi. "It enables us to make more energy available.

2014 Audi R8 GT zooming toward Le Mans reveal

According to a report from Autocar in the UK, the Audi R8 is set to get something of a swan song for its own going-away party in the form of an updated GT model for the 2014 model year. If Autocar is right, this even higher-performance Audi R8 will debut at the upcoming 24 Hours of Le Mans race in France.
The 2014 Audi R8 GT Plus will reportedly get a tuned version of the much-loved 5.2-liter V10 engine that Audi has used to good effect in past R8 models. A six-speed manual or seven-speed dual-clutch automatic would send power to the rear wheels, enabling a 3.4-second 0-62 mile per hour run and a top speed of 199 mph.
Judging from spy shots that we've already seen (reprised above), the new GT Plus will be fitted with an aggressive body kit that includes a massive rear wing, a more prominent front splitter and enlarged side blade ducts. A Spyder version of the GT Plus may be on tap for 2015. Pricing, obviously, is unknown, as is any potential launch date. In other words... stay tuned.

Porsche hybrids come up short at Le Mans

Two cars, one finish, zero victories. That's a brief synopsis of Porsche's hybrid-vehicle performance in the 24 Hours of Le Mans race in France. There's always next year. Porsche entered two 919 Hybrid vehicles in the race. The No. 14 car essentially limped to the finish line after encountering drivetrain problems. The other Porsche hybrid, No. 20, was driven by Germany's Timo Bernhard, New Zealand's Brendon Hartley and Australia's Mark Webber. That car ran for more than 22 hours before its own powertrain issues did that racing team in for good. Both vehicles ran towards the front of the pack at times during the race, and the No. 20 car actually led the race after about 20 hours. Still, both teams said they were disappointed in the results. Porsche sister company Audi came up big for the 13th time in the race's long and storied history. One Audi R18 E-Tron Quattro won the race, while another finished second. The Toyota that had pole-position and was winning much of the race shut down after 15 hours of racing because of electrical issues and Nissan had trouble with is ZEOD RC. Check out Porsche's press release below, and read here for a more general race recap. STRONG PERFORMANCE BY PORSCHE 919 HYBRIDS BUT NO DREAM ENDING IN PROTOTYPE RETURN TO LE MANS Le Mans. After a strong performance by both Porsche 919 Hybrids, the Porsche Team was left empty-handed after a dramatic final stage of the race. Following more than 22 hours, car No. 20 driven by Timo Bernhard (Germany), Brendon Hartley (New Zealand) and Mark Webber (Australia) suffered a powertrain problem at the world's most famous endurance race, the 24 Hours of Le Mans. Earlier in the race the LMP1 class car was leading overall for a significant period of time. The second innovative and highly complex prototype – in the hands of Romain Dumas (France), Neel Jani (Switzerland) and Marc Lieb (Germany) – likewise proved to be very competitive, but was hampered by a drivetrain problem. However, their No. 14 car crossed the finish line under its own power. After a thrilling start to the race with changing weather conditions, numerous accidents and a relatively calm night, Bernhard took the overall lead in the No. 20. The longtime Porsche factory driver returned to the top spot after 20 of the 24 hours. At 12:36 (CET) on Sunday, he handed the leading car over to Webber. Less than 20 minutes later the Australian was forced to slow down and drove solely on electric power back to pit lane.